LED is a highly energy-efficient lighting technology, and has the potential to fundamentally change the future of lighting in the United States. Residential LEDs -- especially ENERGY STAR rated products -- use at least 75% less energy, and last up to 25 times longer, than incandescent lighting.
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Widespread use of LED lighting has a large potential impact on energy savings in the United States. By 2035, the majority of lighting installations are anticipated to use LED technology, and energy savings from LED lighting could top 569 TWh annually by 2035, equal to the annual energy output of more than 92 1,000 MW power plants.
The LED abbreviation stands for Light Emitting Diode. An LED light bulb produces illumination through these diodes, as opposed to the filament and gas contained in incandescent and other older bulb types.
To help you better understand the cost-saving and environmental advantages of LED vs incandescent bulbs, the pros at TCP break down the components of a light bulb made of light emitting diodes, how LEDs work and the many benefits of switching to LED lights.
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An LED light bulb is a solid-state lighting (SSL) device. That means it contains no gasses — unlike incandescent and fluorescent bulbs, which contain argon gas. This gas-free construction makes LED bulbs safer and more efficient in producing illumination.
Instead of heating a filament with an electrical current until it’s hot enough to glow with light the way incandescent bulbs do, LED technology passes energy through a semiconductor to produce light. The semiconductor is typically a solid chemical agent or compound that can conduct electricity, embedded in a circuit board. An LED light is formed when bringing P-Type (+) and N-Type (-) semiconductors together that form a PN Junction. LEDS are considered more environmentally friendly lights because they contain none of the harmful substances found in other lighting types, like lead and mercury. Most LEDs are designed to run on low voltage (12-24V), but many can run on higher voltages (120-277V).
The illumination from an LED bulb shines in only one direction whereas CFLs and incandescents put out heat and light in all directions. This “directional” light source is part of what makes LEDs more energy efficient and appropriate for a variety of applications. They can be configured to produce a rainbow of colored light, as well as a wide range of white lighting color temperatures, measured in Kelvins from warmest candlelight (2000K) to neutral white (3500K) to the coolest bluish white (5000K+).
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